diff options
Diffstat (limited to 'configure.in')
| -rw-r--r-- | configure.in | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/configure.in b/configure.in index a251c9912..ea9b6dd20 100644 --- a/configure.in +++ b/configure.in @@ -708,6 +708,21 @@ AC_HAVE_LIBRARY(dl) AC_CHECK_FUNCS(backtrace) AC_CHECK_FUNCS(dladdr) +AC_MSG_CHECKING([for gcc atomic operations]) +AC_TRY_RUN( +[ + int main() { + volatile int ref = 1; + __sync_fetch_and_add (&ref, 1); + __sync_sub_and_fetch (&ref, 1); + /* Make sure test fails if operations are not supported */ + __sync_val_compare_and_swap(&ref, 1, 0); + return ref; + } +], +[AC_MSG_RESULT([yes]); AC_DEFINE(HAVE_GCC_ATOMIC_OPERATIONS)], +[AC_MSG_RESULT([no])]) + if test x$gmp = xtrue; then AC_HAVE_LIBRARY([gmp],[LIBS="$LIBS"],[AC_MSG_ERROR([GNU Multi Precision library gmp not found])]) AC_MSG_CHECKING([gmp.h version >= 4.1.4]) |